以Mg-8.5Gd-4.5Y-0.7Zn-0.4Zr合金为研究对象，开

Taking Mg-8.5Gd-4.5Y-0.7Zn-0.4Zr alloy as the research object, a basic multi-directional forging study was carried out. The results showed that at the initial forging temperature of 500 ℃, 3 passes, 6 passes, and 9 passes The grain sizes after deformation and 12 passes were 44μm, 2.8μm, 2.2μm and 1.49μm, respectively. After the layered LPSO structure phase is precipitated, it will be twisted in the subsequent deformation process, and the block LPSO structure phase will gradually be broken during the forging process. As the number of deformation passes increases, the maximum texture density of the alloy gradually weakens, and the texture is greatly weakened due to the combined effect of the multi-directional forging rotation force axis and the dynamic precipitation phase. , The tensile strength, yield strength and elongation after fracture of the alloy increase with the increase of deformation passes. In the first 6 passes of deformation, the performance increase is larger, and then the increase slows down. <br>Based on actual production conditions, a pilot test and application verification of multi-directional forging of ingots were carried out, and it was found that the surface quality of the billet after 6-pass multi-directional forging was good. The tensile strength, yield strength and elongation after fracture of the forgings prepared from the blanks after 6-pass multi-directional forging reached 478MPa, 387MPa and 7.0% respectively after aging treatment at 200℃/28h.

With Mg-8.5Gd-4.5Y-0.7Zn-0.4Zr alloy as the research object, a basic study of multi-directional forging was carried out, and the results showed that the temperature of the forging was 500 degrees C at the beginning. Under the conditions, the grain sizes after 3, 6, 9 and 12 deformations were 44 m, 2.8 m, 2.2 m and 1.49 m, respectively. After the layer flaky LPSO structure is analyzed, twisting occurs in the subsequent deformation process, and the block LPSO structure phase is gradually broken up in the forging process. With the increase of deformation, the maximum fabric density of the alloy gradually weakens, and the large weakening of the fabric is due to the joint effect of multi-directional forging rotational force axis and dynamic desection phase. The anti-pull strength, yield strength and elongation rate of the alloy increase with the increase of deformation channel, and in the first 6 deformations, the increase of performance is larger, and then the increase slows down.<br>Combined with the actual production situation, the test and application verification of multi-way forging of ingots were carried out, and the surface quality of blanks after 6 multi-way forging was found to be good. Forgings prepared with 6 multi-directional forging blanks were treated with 200C/28h lattices, and the anti-pull strength, yield strength and post-break elongation rate reached 478MPa, 387MPa and 7.0%, respectively.

The basic research on multi direction forging of mg-8.5gd-4.5y-0.7zn-0.4zr alloy was carried out. The results show that the grain size after 3 passes, 6 passes, 9 passes and 12 passes are 44 μ m, 2.8 μ m, 2.2 μ m and 1.49 μ m respectively at the initial forging temperature of 500 ℃. After the lamellar lpso precipitates, it is twisted in the subsequent deformation process, and the massive lpso structure phase gradually disintegrates in the forging process. With the increase of deformation passes, the maximum texture density of the alloy gradually decreases, which is due to the joint action of multi-directional forging rotating force axis and dynamic precipitates. The tensile strength, yield strength and elongation after fracture of the alloy increase with the increase of deformation passes. In the first six passes of deformation, the increase of properties is larger, and then the increase is slower.<br>Combined with the actual production situation, the pilot test and application verification of ingot multi-directional forging were carried out. It was found that the surface quality of ingot after 6 passes of multi-directional forging was good. The results show that the tensile strength, yield strength and elongation after fracture reach 478 MPa, 387 MPa and 7.0% respectively after aging at 200 ℃ / 28 H.